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Updated: June 1, 2025
The plate upon which is this salt, is again exposed to the vapor of bromine, forming a bromo-iodide of silver, a salt also. As most of the various accelerators are compounds of bromine, with either chlorine or fluorine combination, they partake somewhat of the nature of these latter, giving results which can be detected by the experienced operator.
We have no hesitation in stating that great credit is due to the old Trench Warfare Supply Department and the firms with which it was in contact, notably the one referred to above, in connection with the Loos attack. But for them, we would not have been in a position to retaliate, even at that date. The Allied lachrymator campaign was terribly handicapped by lack of bromine.
"Morphia, cinchonia, quinia, lobelia, belladonna, narcotina, bromine, arsenicum, strychnos colubrina, brucoea ferruginea," muttered the savant, as he examined one vial after the other and replaced it. "Brucoea ferruginea ha! brucine!
d. Every operator should be provided with a bottle of ammonia, as a little sprinkled about the chemical room soon disinfects it of all iodine or bromine vapor, and also tends to facilitate the operation in the camera. History of Iodine.
Much of the lime in our market will not, except it be quite damp, combine with the bromine. This is owing to impurities. Nothing is equal to oyster-shell lime, which I use altogether. Bromide of Lime.
Aqua ammonia, sprinkled about the chemical or coating room, will soon neutralize all the vapor in the atmosphere of either chlorine, bromine, or iodine. No operator should be without, at least, a six-ounce bottle filled with ammonia. A little of its vapor about the camera-box has a decided and happy effect.
There had better be less than carry the color to a deeper shade. The object of using the iodine is to form a compound with bromine that is not so volatile as the bromine itself. No matter how little iodine is combined with the bromine, the vapors possess their relative proportion; hence, only enough iodine to prevent "flaring," or as it is often termed a "scum-coating," is used.
Heated with bromine water to 120°C. it decomposes into bromoform, carbon dioxide, nitrogen, and pyridine. Turning now to the non-volatile and oxygenized bases, we take up first the opium alkaloids. Morphine, C H NO , is a tertiary amine, and appears to contain a hydroxyl group like phenols, to which class of bodies it has some analogies, as is shown in its reaction with ferric chloride.
Throughout the year 1841, I used, with great success, chloride of iodine, applied as one coating occasionally in conjunction with Mr. Wolcott, attempting the use of iodine, bromine, and chlorine, and at times with more or less success.
Moreover, this was the first time for nearly a year that M. Langlois had handled bromine, and when Léonie saw him six months before at the laboratory he was engaged in experiments of quite another kind. Here the savage reasoner would infer that Léonie's spirit had visited M. Langlois. The modern inquirer will probably say that Léonie became aware of what was passing in the mind of M. Richet.
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